CVE-2018-20784
CVSS V2 High 7.5
CVSS V3 Critical 9.8
Description
In the Linux kernel before 4.20.2, kernel/sched/fair.c mishandles leaf cfs_rq's, which allows attackers to cause a denial of service (infinite loop in update_blocked_averages) or possibly have unspecified other impact by inducing a high load.
Overview
- CVE ID
- CVE-2018-20784
- Assigner
- cve@mitre.org
- Vulnerability Status
- Analyzed
- Published Version
- 2019-02-22T15:29:00
- Last Modified Date
- 2021-06-02T15:28:24
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 1 | OR | 4.13 | 4.14.93 |
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 1 | OR | 4.19 | 4.19.15 |
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 1 | OR | 4.20 | 4.20.2 |
| cpe:2.3:o:linux:linux_kernel:5.0:rc1:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:* | 1 | OR | ||
| cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:* | 1 | OR | ||
| cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* | 1 | OR | ||
| cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:redhat:enterprise_linux_for_real_time:8:*:*:*:*:*:*:* | 1 | OR |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:N/AC:L/Au:N/C:P/I:P/A:P
- Access Vector
- NETWORK
- Access Compatibility
- LOW
- Authentication
- NONE
- Confidentiality Impact
- PARTIAL
- Integrity Impact
- PARTIAL
- Availability Impact
- PARTIAL
- Base Score
- 7.5
- Severity
- HIGH
- Exploitability Score
- 10
- Impact Score
- 6.4
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Attack Vector
- NETWORK
- Attack Compatibility
- LOW
- Privileges Required
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- HIGH
- Availability Impact
- HIGH
- Base Score
- 9.8
- Base Severity
- CRITICAL
- Exploitability Score
- 3.9
- Impact Score
- 5.9
References
| Reference URL | Reference Tags |
|---|---|
| https://github.com/torvalds/linux/commit/c40f7d74c741a907cfaeb73a7697081881c497d0 | Patch Third Party Advisory |
| https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.20.2 | Release Notes Vendor Advisory |
| http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c40f7d74c741a907cfaeb73a7697081881c497d0 | Patch Vendor Advisory |
| https://access.redhat.com/errata/RHSA-2019:1959 | Third Party Advisory |
| https://access.redhat.com/errata/RHSA-2019:1971 | Third Party Advisory |
| https://usn.ubuntu.com/4115-1/ | Third Party Advisory |
| https://usn.ubuntu.com/4118-1/ | Third Party Advisory |
| https://usn.ubuntu.com/4211-2/ | Third Party Advisory |
| https://usn.ubuntu.com/4211-1/ | Third Party Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2018-20784 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-20784 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 16:13:57 | Added to TrackCVE | |||
| 2022-12-03 17:35:33 | 2019-02-22T15:29Z | 2019-02-22T15:29:00 | CVE Published Date | updated |
| 2022-12-03 17:35:33 | 2021-06-02T15:28:24 | CVE Modified Date | updated | |
| 2022-12-03 17:35:33 | Analyzed | Vulnerability Status | updated |